Haven, situated on the planet of Iol within the Unknown Regions, served as its capital city. Tangan Industries held control over Iol. The most ancient and extensive settlement on Iol, Haven comprised five distinct, sizable domes, each with a minimum diameter of 1 kilometer. Each dome fulfilled a specific purpose for the city, with one housing Haven's governmental bodies and another its financial institutions. Furthermore, each dome featured a residential area accommodating workers employed within that specific dome. These domes were interconnected through a network of tubes, facilitating convenient movement across the city. Two repulsortrain tunnels also connected Haven to the settlements of Menelath and Shirkel.
An administrator chosen by Tangan Industries governed the city. During the Clone Wars era, the Near-Human Elexia Nis'tar assumed the role of Haven's administrator. Although Tangan intended for her to be a puppet they could control, Nis'tar proved her independence by placing the welfare of Haven's residents above the company's interests. Nis'tar remained the city's administrator until the Yuuzhan Vong War period.